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Cometic Gasket
Cometic BMW N54B30 .040in MLX Cylinder Head Gasket 85mm Bore
SKU: C006 C15257-040
Easy — 1–2 hours
Description
Part #: C15257-040
The HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block.
BMW N54B30 .040in. MLX Cylinder Head Gasket | 85mm Bore
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
MIA's Description
This gasket is engineered for specific BMW applications, including the 135i (2008-2010), 335i (2007-2010), X6 (2008-2010), and Z4 (2009-2016) models. Cometic emphasizes customer satisfaction through quality products and advanced manufacturing processes.
Fitment
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Specifications
| Brand | Cometic Gasket |
| Part Number | C006 C15257-040 |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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